CN116067326A

CN116067326A - Front landing gear buffer strut integral detection device and detection method

Info

Publication number: CN116067326A
Application number: CN202310279772.2A
Authority: CN
Inventors: 白亚玲; 刘华; 胡阿林; 杨怀忠; 柴伟
Original assignee: AVIC Landing Gear Advanced Manufacturing Corp
Current assignee: AVIC Landing Gear Advanced Manufacturing Corp
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-05-05

Abstract

The invention provides a nose landing gear buffer strut integral detection device and a detection method. The detection device comprises a detection platform, a journal assembly, a joint assembly, an axle detection mandrel and a joint detection mandrel, wherein a stop pin is arranged on the journal assembly, a positioning size L is arranged on the journal assembly in a second direction, and one end of the positioning size L falls on one side surface of the stop pin; the connector detection mandrel is provided with a first measuring surface and a second measuring surface; the top of the axle assembly is provided with the axle detection mandrel and an axle axis, and the axle assembly is provided with a third measuring surface and a fourth measuring surface. The invention designs a proper reference plane, and the offset degree is obtained by detecting the distance between each axis and the corresponding reference plane, so that the performance index of the landing gear is ensured, and the safe operation of the aircraft is ensured.

Description

Front landing gear buffer strut integral detection device and detection method

Technical Field

The invention relates to the technical field of aircraft landing gear part machining, in particular to a front landing gear buffer strut integral detection device and a detection method.

Background

As shown in fig. 1, the nose landing gear buffer strut 10 mainly includes a journal 101, an outer cylinder 102, a rotary sleeve 103, and a piston rod 104, which are disposed in this order. The shaft neck 101 is connected with the airplane main body, the rotary sleeve 103 is used for connecting the outer cylinder 102 of the buffer strut and the piston rod 104, and the rotary sleeve 103 is provided with a torsion preventing arm hole for installing an upper torsion preventing arm. The end of the piston rod 104 remote from the rotating sleeve 103 is provided with an axle hole 105, said axle hole 105 being used for mounting an axle for mounting the wheels.

The buffer strut 10 needs to meet various performance requirements of the aircraft, and before the aircraft leaves the factory, the size, the position relation and the like of main parts of the buffer strut need to be detected integrally, so that the design requirements are met, and the aircraft can be ensured to run safely.

At present, the outline dimension of the nose landing gear buffer strut 10 is long, how to effectively detect, and which index values can accurately feed back the quality performance is the important point to be studied.

Accordingly, it is desirable to provide a detection device and a detection method that can be used for nose landing gear buffer strut detection, which solve the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a device and a method for integrally detecting a front landing gear buffer support, which can accurately detect the long-distance space size and the mutual position relation of the front landing gear buffer support and ensure the smooth delivery of a landing gear.

The technical scheme of the invention is as follows: the whole detection device of the front landing gear buffer support comprises a detection platform, a journal assembly, a joint assembly, an axle detection mandrel and a joint detection mandrel, wherein the journal assembly, the joint assembly, the axle assembly and the axle detection mandrel are sequentially arranged on the detection platform along a first direction, the joint detection mandrel is used for penetrating through an anti-torsion arm hole on the buffer support, a stop pin for positioning a journal on the buffer support and forming a reference axis with the axial lead of the journal is arranged on the journal assembly, a positioning size L is arranged on the journal assembly along a second direction, one end of the positioning size L falls on one side surface of the stop pin, and the first direction and the second direction are mutually perpendicular on the same overlook projection plane;

the connector detection mandrel comprises a connector assembly, a buffer support and a detection mandrel, wherein the connector assembly is provided with a first measuring surface for measuring the distance L1 between the connector assembly and the torque-proof hole axis and a second measuring surface for measuring the distance L2 between the connector assembly and the torque-proof hole axis of the buffer support;

the top of the axle assembly is provided with an axle detection mandrel which is used for penetrating through an axle on the buffer support, the axle center of the axle detection mandrel forms an axle axis, and the axle assembly is provided with a third measuring surface which is used for measuring a distance L3 between the axle assembly and the axle axis and a fourth measuring surface which is used for measuring a distance L4 between the axle assembly and the axle axis;

the first measuring surface and the third measuring surface are vertically arranged, and the second measuring surface and the fourth measuring surface are parallel to the detection platform.

In the scheme, a journal assembly is arranged, a reference axis is formed through positioning at a distance L, and then the axis of a torsion-preventing arm hole on the joint assembly and the axis of the wheel shaft on the wheel shaft assembly are positioned according to the reference axis; and proper datum planes are designed on the joint assembly and the wheel shaft assembly, and the parallelism (namely the skewness) of the axis of the torsion-preventing arm mounting hole relative to the axis of the shaft neck and the parallelism of the axis of the wheel shaft hole on the piston rod relative to the axis of the shaft neck are obtained by measuring the distance between the axis of the torsion-preventing arm hole and the corresponding datum plane, so that the performance index of the landing gear is ensured, and the safe operation of the aircraft is ensured.

Preferably, the journal assembly comprises a bracket, a shaft pressing assembly and a side pushing assembly, wherein two ends of the bracket in the second direction are respectively provided with the shaft pressing assembly, the stop pin is arranged on the shaft pressing assembly, the stop pin on the shaft pressing assembly at one end forms a positioning size L, the side pushing assembly is arranged at the side of the shaft pressing assembly at the other end, and the side pushing assembly axially stretches towards the direction of the positioning size L.

Preferably, the axle pressure component comprises a V-shaped block, a pressing plate, lugs, a first movable joint bolt, a second movable joint bolt and a handle nut, wherein the bottom of the V-shaped block is arranged on the bracket, a V-shaped opening is formed at the top of the V-shaped block, and the stop pins are respectively arranged on two side walls of the V-shaped opening; the pressing plate is positioned above the V-shaped block, the lug is hinged to one end of the V-shaped block, and the first movable joint bolt is connected to the lug and hinged to the pressing plate; the second movable joint bolt is hinged to the other end of the V-shaped block, the handle nut is connected to the second movable joint bolt in a threaded mode, an opening is formed in one end, away from the first movable joint bolt, of the pressing plate, and the second movable joint bolt can rotate around and is clamped in the opening.

Preferably, the surface of the pressing plate opposite to the V-shaped opening is an arc-shaped surface.

Preferably, the detection platform is provided with a first hole group for detecting and positioning a first type of buffer support column, a second hole group for detecting and positioning a second type of buffer support column and a third hole group for detecting and positioning a third type of buffer support column, the three hole groups share 01 holes and 02 holes, the 01 holes and the 02 holes are arranged close to the journal assembly, and the center line of the 01 holes and one side surface of the stop pin form the positioning size L.

Preferably, the joint assembly comprises a second bottom plate, a first bushing, a measuring block and a joint bracket, wherein at least one through hole is respectively arranged at two ends of the second bottom plate in the second direction, the first bushing is arranged in the through hole, and a bolt and a detection platform are inserted into the first bushing to be positioned; the connector brackets are arranged on the second bottom plate at intervals, vertical edges and transverse edges which are of L-shaped structures are formed at the upper ends of the connector brackets, the vertical edges and the transverse edges are respectively provided with one measuring block, the outer surfaces of the measuring blocks on the vertical edges form a first measuring surface, and the lower surfaces of the measuring blocks on the transverse edges form a second measuring surface.

Preferably, the lateral edge is located at the lower end of the vertical edge and the lateral edge is located closer to the journal assembly.

Preferably, the axle assembly comprises a third bottom plate, a U-shaped seat, a second bushing and an axle support, wherein at least one through hole is respectively arranged at two ends of the third bottom plate in the second direction, the second bushing is arranged in the through hole, and a bolt and a detection platform are inserted into the second bushing to be positioned; the wheel axle support is arranged on the third bottom plate at intervals, the U-shaped seat is arranged at the upper end of the wheel axle support, the wheel axle detection mandrel is clamped in the U-shaped seat, and the third measuring surface and the fourth measuring surface are formed on the U-shaped seat.

Preferably, the nose landing gear cushioning strut integrated testing device further comprises a support assembly for bottom supporting the cushioning strut, the support assembly being mounted on the testing platform and located between the joint assembly and the axle assembly.

The invention also provides a method for detecting the whole of the buffer strut of the nose landing gear, which is carried out by adopting the device for detecting the whole of the buffer strut of the nose landing gear, and comprises the following steps:

step one, installing a buffer strut

Step 1.1, positioning a journal assembly, a joint assembly and a wheel shaft assembly at corresponding positions on a detection platform according to the model of a buffering support column to be detected;

step 1.2, forming a reference axis according to the axis of the journal of the buffer support, mounting the journal on a stop pin of the journal assembly, keeping the buffer support at a neutral position, and fixing the journal through the journal assembly;

step 1.3, installing a joint detection mandrel in an anti-torsion arm hole on a rotary sleeve of a buffer support, and forming a point B and a point B1 at two ends of the axis of the joint detection mandrel respectively;

step 1.4, installing an axle detection mandrel in an axle hole of the buffer support, placing the axle detection mandrel on an axle assembly, and forming a point C and a point C1 at two ends of the axis of the axle detection mandrel respectively;

step two, starting detection

Step 2.1, measuring parallelism of the torsion-preventing arm hole axis relative to the reference axis, and setting a distance L1 along a first direction and a distance L2 perpendicular to the detection platform between the joint assembly and the torsion-preventing arm hole axis;

step 2.1.1, detecting and recording the spacing L1 at the point B and the point B1 respectively, and comparing the difference value of the spacing L1 measured at the two times, if the difference value is lower than a set qualification value, the spacing L1 is qualified, and if the difference value is higher than the set qualification value, the spacing L1 is unqualified;

step 2.1.2, detecting and recording the distance L2 between the point B and the point B1 respectively, and comparing the difference value of the distance L2 measured for the two times, if the difference value is lower than a set qualification value, the distance is qualified, and if the difference value is higher than the set qualification value, the distance is unqualified;

step 2.2, measuring the parallelism of the axle axis relative to the reference axis, and setting a spacing L3 along the first direction and a spacing L4 perpendicular to the detection platform between the axle assembly and the axle axis;

step 2.2.1, detecting and recording the spacing L3 at the point C and the point C1 respectively, and comparing the difference value of the spacing L3 measured at the two times, if the difference value is lower than a set qualification value, the spacing is qualified, and if the difference value is higher than the set qualification value, the spacing is unqualified;

step 2.2.2, detecting and recording the spacing L4 at the point C and the point C1 respectively, and comparing the difference value of the spacing L4 measured at the two times, if the difference value is lower than a set qualification value, the spacing L4 is qualified, and if the difference value is higher than the set qualification value, the spacing L4 is unqualified;

and step three, disassembling the buffer support, outputting a detection result, and finishing detection.

Compared with the related art, the invention has the beneficial effects that:

1. the detection platform of the detection device has higher universality and can be used for the installation and detection of a plurality of types of nose landing gear buffer struts;

2. by providing a spacing L to ensure the position of the buffer post in the journal assembly and to effectively locate, the datum axis A-A1 is facilitated;

3. the detection platform is provided with a hole group for positioning the buffer struts of various types, the hole groups share 01 holes (datum holes), and the rest holes are respectively used for positioning the joint assembly and the wheel shaft assembly, so that the distances between the 01 holes and datum surfaces on the positioning joint assembly and the wheel shaft assembly can be customized, the distances between the datum surfaces on the joint assembly and the wheel shaft assembly and corresponding axes are measured, the offset degree and the total length of the datum axes (namely the journal axes) and the wheel shaft axes can be effectively detected, and the detection index which can most feed back the quality performance of the buffer struts is obtained;

4. the detection device simplifies the complex detection of the ultra-long distance into the controllable indirect detection of the short distance between each axis and the reference surface on the component beside the axis, and is easy to operate.

Drawings

FIG. 1 is a schematic perspective view of a nose landing gear buffer post overall detection device provided by the invention;

FIG. 2 is a schematic diagram of the front projection structure of the whole detection device for the buffer strut of the nose landing gear;

FIG. 3 is a schematic structural diagram of the detection platform;

FIG. 4 is a schematic perspective view of a journal assembly;

FIG. 5 is a schematic view of a front projection configuration of the journal assembly;

FIG. 6 is a schematic side view of a side projection configuration of the journal assembly;

FIG. 7 is a schematic view of the structure of the stopper pin;

FIG. 8 is a schematic structural view of a platen;

FIG. 9 is a schematic structural view of a joint assembly;

FIG. 10 is a schematic view of the structure of the support pedestal;

fig. 11 is a schematic structural view of the axle assembly.

Detailed Description

The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. For convenience of description, the words "upper", "lower", "left" and "right" are used hereinafter to denote only the directions corresponding to the upper, lower, left, and right directions of the drawings, and do not limit the structure.

As shown in fig. 1 and 2, the whole detection device for the nose landing gear buffer post provided by the embodiment comprises a detection platform 1, a journal assembly 2, a joint detection mandrel 3, a screw 4, a bolt 5, a joint assembly 6, a support assembly 7, an axle assembly 8 and an axle detection mandrel 9. The journal assembly 2, the joint assembly 6, the support assembly 7 and the axle assembly 8 are arranged in sequence on the inspection platform 1 along a first direction X. The journal assembly 2, the joint assembly 6, the supporting assembly 7 and the wheel shaft assembly 8 are mutually independent on the detection platform 1, and the detection mandrel and the stop pin can be replaced for detecting the same-series nose landing gear buffer struts respectively in an assembling and disassembling mode.

The detection platform 1 can be used for mounting and detecting various nose landing gear buffer struts. The detection platform 1 is large in size, the bottom of the detection platform is installed in a factory building, the detection platform is leveled by a plurality of jacks, and the flatness reaches 0.07mm. The working surface is provided with a plurality of M12-6H threaded holes according to the type of the nose landing gear, and the dimensional tolerance of the pitch of the threaded holes is +/-0.1.

As shown in fig. 3, the detection platform 1 is provided with a first hole group for detecting and positioning a first type of buffer support, a second hole group for detecting and positioning a second type of buffer support, and a third hole group for detecting and positioning a third type of buffer support. The reference numerals in fig. 3 are merely numerical sequence numbers of holes (physical marks on the detection platform 1) and are independent of the reference numerals of the parts. Three types of buffer struts share 01 and 02 apertures, with 01 and 02, 03 and 04, 05 and 06 for detection positioning of one type of nose landing gear buffer strut; 01 and 02, 07 and 08, 09 and 10 for another type of nose gear buffer strut detection positioning; 11 and 12, 13 and 14, 15 and 16 are used for a third type of nose gear cushion strut detection positioning.

The detection platform 1 is provided with a plurality of threaded holes and positioning holes, and the positioning holes are tightly matched with the bushings. The design of the positioning hole distance and the connecting hole distance on the first bottom plate 2-14-2 of the journal assembly 2 is based on the design of the positioning bushing hole and the threaded connecting hole position of the phi 12H6 of the detection platform 1, and the positioning is realized through bolts 5 (two) and screws 4. Similarly, the joint bracket 6-1 of the joint assembly 6 and the wheel axle support 8-1 of the wheel axle assembly 8 are also designed and installed; the supporting component 7 can move on the detection platform 1 and is supported on the outer diameter of the piston rod by the 7-2-1 surface according to the size of the buffer strut of the nose landing gear.

The detection platform 1 is formed with a first direction X and a second direction Y, and the first direction X and the second direction Y are perpendicular to each other on the same plane projection plane.

As shown in fig. 4-6, the journal assembly 2 includes brackets 2-14, an axle-press assembly 21, and a side-push assembly 22. The shaft pressing assembly 21 and the side pushing assembly 22 form a two-pressing and one-pressing fixing mode for the shaft neck 101. The bracket 2-14 comprises an upper flat plate 2-14-1, a first bottom plate 2-14-2, a vertical plate 2-14-3 and a rib plate 2-14-4. The upper flat plate 2-14-1 and the first bottom plate 2-14-2 are arranged at intervals up and down, and the vertical plate 2-14-3 is connected between the upper flat plate and the first bottom plate. The rib plates 2-14-4 are connected among the upper flat plate 2-14-1, the first bottom plate 2-14-2 and the vertical plate 2-14-3. The first bottom plate 2-14-2 is designed with 4 phi 13 holes and 2 phi 18H7 bushing mounting holes (01 holes and 02 holes), and the bushing mounting holes are internally provided with bushings 2-15 for mounting and positioning the whole journal assembly 2 on the detection platform 1.

The first base plate 2-14-2 is mounted on the detection platform 1 and extends in the second direction Y. The two ends of the upper flat plate 2-14-1 are respectively provided with the shaft pressing component 21. The axle pressure assembly 21 comprises a V-shaped block 2-13, a pressing plate 2-10, an ear 2-6, a first swing bolt 2-4, a second swing bolt 2-11 and a handle nut 2-9. The bottom of the V-shaped block 2-13 is positioned on the upper flat plate 2-14-1 of the bracket 2-14 through a large cylindrical pin 2-12, and is fixedly connected through a screw 4 after being positioned. The tops of the V-shaped blocks 2-13 form V-shaped openings.

The number of the stop pins 2-8 is four, every two stop pins are installed on two inclined planes of the V-shaped blocks 2-13 in a press fit mode through H7/r6, and the stop pins 2-8 are inserted into the V-shaped blocks 2-13 through the small cylindrical pins 2-7 to abut against the stop pins 2-8 so as to prevent the stop pins 2-8 from rotating. As shown in FIG. 7, the stop pin 2-8 comprises a rod part and a head part, wherein the rod part is provided with an anti-rotation hole for inserting the small cylindrical pin 2-7, the head part is a square head, and one side surface of the square head is a reference surface 2-8-1. As shown in fig. 5 and 7, the reference surface 2-8-1 faces the center of the journal assembly 2, and the reference surface 2-8-1 is a positioning surface of the outer end surface 1011 of the journal 101 when detecting. After the journal 101 is placed on the stop pin 2-8, its axis forms the reference axis (i.e., journal axis) A-A1. The reference axis A-A1 is used as a reference, and the buffer post 10 is positioned and clamped in a neutral position and then is not moved.

The design of journal assembly 2 requires strict control of the reference plane 2-8-1 on journal assembly 21 near the 01 bore side to the distance L (shown in fig. 5) between the center of the bore (01 bore) of the phi 12 bushing, with a tolerance of + -0.05. The center distance between the two phi 12 bushing holes (01, 02 holes) is 500+/-0.01, and the bolt 5 is inserted, so that the journal assembly 2 is reliably positioned, and the repeated positioning accuracy is high.

The pressing plate 2-10 is positioned above the V-shaped block 2-13, the lug 2-6 is hinged to one end of the V-shaped block 2-13 through the large cylindrical pin 2-12, and the lug 2-6 can rotate around the large cylindrical pin 2-12 within a certain range. The threaded end of the first movable joint bolt 2-4 is connected in a threaded hole in the lug 2-6, and the other end of the first movable joint bolt is hinged with the pressing plate 2-10 through a large cylindrical pin 2-12. The flat nut 2-5 is locked after the first swing bolt 2-4 is adjusted in place, the first swing bolt 2-4 being locked in length in use. The length of the second swing bolt 2-11 is longer than the length of the first swing bolt 2-4. The second movable joint bolt 2-11 is arranged on the V-shaped block 2-13 through a large cylindrical pin 2-12, and the threaded end is screwed up through a handle nut 2-9, so that the pressing plate 2-10 can be fixed. Bushings 2-15 are press fit mounted to the bottom surface of the support blocks 2-14 at H7/r6 for positioning of the journal assembly 2 on the inspection platform 1.

As shown in fig. 4 and 8, an opening 2-101 is provided at an end of the pressing plate 2-10 away from the first movable joint bolt 2-4, and the second movable joint bolt 2-11 can rotate around and be clamped in the opening 2-101. The surface of the pressing plate 2-10 opposite to the V-shaped opening is an arc-shaped surface 2-102.

The side push assembly 22 is located adjacent to the 01 hole and beside the axial compression assembly 21. The side pushing assembly 22 comprises a pressing block 2-1, a base 2-2 and a pressing handle 2-3. The bottom of the base 2-2 is mounted on the upper flat plate 2-14-1 through bolts, and the upper end of the base 2-2 is horizontally connected with the compression handle 2-3 through bolts. The pressing block 2-10 is arranged at the tail end of the pressing handle 2-3 facing the datum plane 2-8-1 forming the distance L. By rotating the compression handle 2-3, it can be axially expanded and contracted to be able to abut against or be released from the inner end surface 1012 of the journal 101.

As shown in fig. 1 and 9, the joint assembly 6 includes a second base plate 6-1, a first bushing 6-2, a measuring block 6-3, and a joint bracket 6-4. At least one through hole is respectively arranged at two ends of the second bottom plate 6-1 in the second direction, the first bushing 6-2 is arranged in the through hole, the first bushing 6-2 is in press fit with the through hole on the joint support 6-4 in a H7/r6 mode, and the hole distance (03, 04 holes) between the two bushings is 500+/-0.01. The plug pin 5 is inserted into the first bushing 6-2 to be positioned in a press fit with the

holes

03 and 04 on the detection platform 1 in H7/r 6. The joint brackets 6-4 are arranged on the second bottom plate 6-1 at intervals, and vertical edges 6-5 and transverse edges 6-6 which are L-shaped structures are formed at the upper ends of the joint brackets 6-4. The lateral edge 6-6 is located at the lower end of the vertical edge 6-5, and the lateral edge 6-6 is disposed closer to the journal assembly 2. The vertical edge 6-5 and the horizontal edge 6-6 are respectively provided with the measuring block 6-3, the outer surface of the measuring block 6-3 on the vertical edge 6-5 forms a first measuring surface 61, and the lower surface of the measuring block 6-3 on the horizontal edge 6-6 forms a second measuring surface 62. The measuring block 6-3 comprises a small end cylinder and a large end cylinder which are sequentially arranged, the small end cylinder and the joint support 6-4 form H7/r6 to be in compression fit, and the outer surface of the large end cylinder forms measuring surfaces of L1 and L2.

As shown in fig. 2, the joint detection spindle 3 passes through the torque proof arm hole of the rotary sleeve 103, and the axial lead of the joint detection spindle 3 forms a torque proof arm hole axis B-B1. A measurement distance L1 is provided between the first measurement surface 61 and the torque arm hole axis B-B1. A measurement distance L2 is provided between the second measurement surface 62 and the torque arm hole axis B-B1.

As shown in fig. 1, 2 and 10, the support assembly 7 includes a support stand 7-1 and a support 7-2. The bottom of the supporting support 7-1 is arranged on the detection platform 1, and the top of the supporting support is provided with a U-shaped groove 7-1-1. The support 7-2 is a rectangular tube which is placed in the U-shaped groove 7-1-1, and the top surface 7-2-1 of the support 7-2 contacts the outer surface of the piston rod 104, so that the buffer post 10 is kept in the neutral position after the journal 101 is positioned. The support assembly 7 can be slid onto the detection platform 1 to any desired position.

As shown in fig. 1, 2 and 11, the axle assembly 8 includes a third floor 8-1, a U-shaped seat 8-2, a second bushing 8-5 and an axle support 8-6. At least one through hole is respectively arranged at two ends of the third bottom plate 8-1 in the second direction, a second bushing 8-5 is arranged in the through hole, and a bolt 5 is inserted into the second bushing 8-5 to be positioned with the detection platform 1; the wheel axle supports 8-6 are arranged on the third bottom plate 8-1 at intervals, the U-shaped seat 8-2 is arranged at the upper end of the wheel axle support 8-6, the wheel axle detection mandrel 9 is clamped in the U-shaped seat 8-2, and a third measuring surface 81 and a fourth measuring surface 82 are formed on the U-shaped seat 8-2. A measuring distance L3 is provided between the third measuring surface 81 and the wheel axis C-C1. A measuring distance L4 is provided between the fourth measuring surface 82 and the wheel axis C-C1.

The first measuring surface 61 and the third measuring surface 81 are vertically arranged, and the second measuring surface 62 and the fourth measuring surface 82 are parallel to the detecting platform 1.

The third bottom plate 8-1 is inserted into corresponding

holes

05 and 06 through 4

bolts

4 and 2 bolts 5 to be positioned and connected in the detection platform 1.

The invention also provides a detection method for detecting the whole of the buffer strut of the nose landing gear, which is carried out by adopting the detection device for detecting the whole of the buffer strut of the nose landing gear, and comprises the following steps:

step one, installing a buffer strut

And step 1.1, positioning the journal assembly 2, the joint assembly 6 and the wheel shaft assembly 8 at corresponding positions on the detection platform 1 according to the model of the buffer post to be detected. The support assembly 7 is placed on the detection platform 1, is adjusted between the joint assembly 3 and the wheel shaft assembly 8, and is symmetrical relative to the wheel shaft assembly 8 in the width direction.

Step 1.2, the journal 101 is mounted to the stop pin 2-8 of the journal assembly 2, and the piston rod 104 is placed on the support 7-2 of the support assembly 7 with the shock absorber strut 10 in the neutral position, with the reference axis A-A1 formed from the axis of the journal 101 of the shock absorber strut 10. The compression handle 2-3 of the journal assembly 2 is utilized to axially compress the inner end surface 1012 of the journal 101 along the journal 101 to lock the datum surface 2-8-1. The pressing plate 2-10 is rotated and the handle nut 2-9 is locked.

Step 1.3, the joint detection mandrel 3 is mounted in the anti-torsion arm hole on the rotary sleeve 103 of the buffer post 10 (in clearance fit with the anti-torsion arm hole in H9/f 8) so that both ends of the mandrel extend out of the anti-torsion arm mounting hole. Point B and point B1 are formed at both ends of the axis of the joint detection mandrel 3, respectively.

In step 1.4, an axle detection mandrel 9 is installed in the axle hole 105 of the buffer support post 10 (in clearance fit with the axle hole in H8/f 7), and the axle detection mandrel 9 is placed on the axle assembly 8, and points C and C1 are formed at both ends of the axis of the axle detection mandrel 9, respectively.

Step two, starting detection

Step 2.1, measuring the parallelism of the torsion arm hole axis B-B1 relative to the reference axis A-A1, and setting a spacing L1 along the first direction and a spacing L2 perpendicular to the detection platform 1 between the joint assembly 6 and the torsion arm hole axis B-B1;

and 2.1.1, detecting and recording the spacing L1 at the point B and the point B1 respectively, and comparing the difference value of the spacing L1 measured at the two times, if the difference value is lower than a set qualified value, determining that the sample is qualified, and if the difference value is higher than the set qualified value, determining that the sample is unqualified. Such as: the measured difference is no more than 0.2mm in length of 100 mm. And if the difference value of the two detection results is not more than 0.2mm, the straight line distance between the axis B-B1 of the torsion-preventing arm hole and the reference axis A-A1 is qualified.

And 2.1.2, detecting and recording the spacing L2 at the point B and the point B1 respectively, and comparing the difference value of the spacing L2 measured at the two times, if the difference value is lower than a set qualification value, the spacing is qualified, and if the difference value is higher than the set qualification value, the spacing is unqualified. Such as: the measured difference is no more than 0.2mm in length of 100 mm. And if the difference value of the two detection results is not more than 0.2mm, the parallelism and the skewness of the torsion-preventing arm hole axis B-B1 relative to the reference axis A-A1 are qualified.

In step 2.2, the parallelism of the axle axis C-C1 with respect to the reference axis A-A1 is measured, and then a spacing L3 in the first direction and a spacing L4 perpendicular to the detection platform 1 are set between the axle assembly 8 and the axle axis C-C1.

And 2.2.1, detecting and recording the spacing L3 at the point C and the point C1 respectively, and comparing the difference value of the spacing L3 measured at the two times, if the difference value is lower than a set qualification value, the spacing is qualified, and if the difference value is higher than the set qualification value, the spacing is unqualified. Such as: the measurement difference between the points C and C1 is not more than 0.3mm in length of 100mm, and the measurement difference is not more than 1.5mm in length of 200 mm. Detecting for more than 3 times, taking the arithmetic average value of L3, wherein the average value difference is not more than 1.5mm, and the distance between the axle axis C-C1 and the reference axis A-A1 is qualified.

And 2.2.2, detecting and recording the spacing L4 at the point C and the point C1 respectively, and comparing the difference value of the spacing L4 measured at the two times, if the difference value is lower than a set qualified value, determining that the sample is qualified, and if the difference value is higher than the set qualified value, determining that the sample is unqualified. Such as: the measurement difference between the points C and C1 is not more than 0.3mm in length of 100mm, and the measurement difference is not more than 1.5mm in length of 200 mm. And if the difference value of the two detection results is not more than 1.5mm, the parallelism between the axle axis C-C1 and the reference axis A-A1 is qualified.

Any of the above-mentioned measured L1, L2, L3, L4 is failed, and is failed.

L1, L2, L3 and L4 can be detected for a plurality of times

Step three, the joint detection spindle 3 and the wheel axle detection spindle 9 are removed. The reverse unscrewing of the compression handle 2-3 and the press block 2-1 releases the journal inner end surface 1012 along the axial movement of the journal 101. And then the handle nut 2-9 is loosened, and the second movable joint bolt 2-11 is rotated outwards around the large cylindrical pin 2-12. The pressing plate 2-10 reversely rotates around the other large cylindrical pin 2-12, the buffer support column 10 is disassembled, and the whole detection is finished.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. The front landing gear buffer support integral detection device is characterized by comprising a detection platform (1), an axle detection mandrel (9), a joint detection mandrel (3) used for penetrating through a torsion arm hole on a buffer support, and a journal assembly (2), a joint assembly (6) and an axle assembly (8) which are sequentially arranged on the detection platform (1) along a first direction, wherein a stop pin (2-8) used for positioning a journal on the buffer support and forming a reference axis (A-A 1) of the axial lead of the journal is arranged on the journal assembly (2), a positioning size L is arranged on the journal assembly (2) along a second direction, one end of the positioning size L falls on one side surface of the stop pin (2-8), and the first direction and the second direction are mutually perpendicular on the same overlooking projection surface;

the connector detection mandrel (3) is provided with a torque-proof arm hole axis (B-B1) on the axial lead, and the connector assembly (6) is provided with a first measuring surface (61) for measuring the distance L1 between the connector assembly and the torque-proof arm hole axis (B-B1) and a second measuring surface (62) for measuring the distance L2 between the connector assembly and the torque-proof arm hole axis (B-B1) of the buffer support;

the top of the wheel axle assembly (8) is provided with the wheel axle detection mandrel (9) which is used for penetrating through the wheel axle on the buffer support, the axial lead of the wheel axle detection mandrel (9) forms a wheel axle axis (C-C1), and the wheel axle assembly (8) is provided with a third measuring surface (81) which is used for measuring the distance L3 between the wheel axle assembly and the wheel axle axis (C-C1) and a fourth measuring surface (82) which is used for measuring the distance L4 between the wheel axle assembly and the wheel axle axis (C-C1);

the first measuring surface (61) and the third measuring surface (81) are vertically arranged, and the second measuring surface (62) and the fourth measuring surface (82) are parallel to the detection platform (1).

2. The nose landing gear buffer strut integrated detection device according to claim 1, wherein the journal assembly (2) comprises a bracket (2-14), an axle-pressing assembly (21) and a side pushing assembly (22), the two ends of the bracket (2-14) in the second direction are respectively provided with the axle-pressing assembly (21), the stop pin (2-8) is mounted on the axle-pressing assembly (21), the stop pin (2-8) on the axle-pressing assembly (21) at one end forms a positioning dimension L, the side pushing assembly (22) is arranged beside the axle-pressing assembly (21) at the other end, and the side pushing assembly (22) axially stretches towards the direction of the positioning dimension L.

3. The nose landing gear buffer strut integrated detection device according to claim 2, wherein the axle-pressing assembly (21) comprises a V-shaped block (2-13), a pressing plate (2-10), an ear (2-6), a first swing bolt (2-4), a second swing bolt (2-11) and a handle nut (2-9), the bottom of the V-shaped block (2-13) is mounted on the bracket (2-14), a V-shaped opening is formed at the top, and the stop pins (2-8) are respectively arranged on two side walls of the V-shaped opening; the pressing plate (2-10) is positioned above the V-shaped block (2-13), the lug (2-6) is hinged to one end of the V-shaped block (2-13), and the first movable joint bolt (2-4) is connected to the lug (2-6) and hinged to the pressing plate (2-10); the second movable joint bolt (2-11) is hinged to the other end of the V-shaped block (2-13), the handle nut (2-9) is connected to the second movable joint bolt (2-11) in a threaded mode, one end, away from the first movable joint bolt (2-4), of the pressing plate (2-10) is provided with an opening (2-101), and the second movable joint bolt (2-11) can rotate around and be clamped in the opening (2-101).

4. A nose landing gear buffer strut integrity test device according to claim 3, wherein the face of the pressure plate (2-10) opposite the V-shaped mouth is an arcuate face (2-102).

5. The nose landing gear buffer strut overall detection device according to claim 1, wherein a first hole group for detecting and positioning a buffer strut of a first type, a second hole group for detecting and positioning a buffer strut of a second type and a third hole group for detecting and positioning a buffer strut of a third type are arranged on the detection platform (1), the three hole groups share 01 holes and 02 holes, the 01 holes and the 02 holes are arranged close to the journal assembly (2), and the center line of the 01 holes and one side surface of the stop pin (2-8) form the positioning dimension L.

6. The nose landing gear buffer strut integrated detection device according to claim 1, wherein the joint assembly (6) comprises a second base plate (6-1), a first bushing (6-2), a measuring block (6-3) and a joint bracket (6-4), at least one through hole is respectively arranged at two ends of the second base plate (6-1) in a second direction, the first bushing (6-2) is arranged in the through hole, and a bolt (5) is inserted into the first bushing (6-2) to be positioned with the detection platform (1); the connector supports (6-4) are arranged on the second bottom plate (6-1) at intervals, vertical edges (6-5) and transverse edges (6-6) which are of L-shaped structures are formed at the upper ends of the connector supports (6-4), the vertical edges (6-5) and the transverse edges (6-6) are respectively provided with one measuring block (6-3), the outer surfaces of the measuring blocks (6-3) on the vertical edges (6-5) form the first measuring surfaces (61), and the lower surfaces of the measuring blocks (6-3) on the transverse edges (6-6) form the second measuring surfaces (62).

7. Nose landing gear buffer strut integrated testing device according to claim 6, characterized in that the transverse edge (6-6) is located at the lower end of the vertical edge (6-5) and that the transverse edge (6-6) is arranged closer to the journal assembly (2).

8. The nose landing gear buffer strut integrated detection device according to claim 1, wherein the wheel axle assembly (8) comprises a third base plate (8-1), a U-shaped seat (8-2), a second bushing (8-5) and a wheel axle support (8-6), at least one through hole is respectively arranged at two ends of the third base plate in the second direction, the second bushing (8-5) is arranged in the through hole, and a bolt (5) is inserted into the second bushing (8-5) to be positioned with the detection platform (1); the wheel axle supports (8-6) are arranged on the third bottom plate (8-1) at intervals, the U-shaped base (8-2) is arranged at the upper end of the wheel axle support (8-6), the wheel axle detection mandrel (9) is clamped in the U-shaped base (8-2), and the third measuring surface (81) and the fourth measuring surface (82) are formed on the U-shaped base (8-2).

9. Nose landing gear cushioning strut integrated testing apparatus according to claim 1, further comprising a support assembly (7) for bottom supporting the cushioning strut, said support assembly (7) being mounted on the testing platform (1) and located between the joint assembly (6) and the axle assembly (8).

10. A method of detecting the integrity of a nose landing gear buffer strut using a nose landing gear buffer strut integrity detection device as claimed in any one of claims 1 to 9, comprising:

step one, installing a buffer strut

Step 1.1, positioning a journal assembly (2), a joint assembly (6) and a wheel shaft assembly (8) at corresponding positions on a detection platform (1) according to the model of a buffering support column to be detected;

step 1.2, forming a reference axis (A-A 1) according to the axial lead of the journal (101) of the buffer support (10), mounting the journal (101) on a stop pin (2-8) of the journal assembly (2), and keeping the buffer support (10) in a neutral position, and fixing the journal (101) through the journal assembly (2);

step 1.3, installing a joint detection mandrel (3) in a torsion arm hole on a rotary sleeve (103) of a buffer support (10), and forming a point B and a point B1 at two ends of the axis of the joint detection mandrel (3) respectively;

step 1.4, installing an axle detection mandrel (9) in an axle hole (105) of a buffer support column (10), placing the axle detection mandrel (9) on an axle assembly (8), and forming a point C and a point C1 at two ends of the axis of the axle detection mandrel (9) respectively;

step two, starting detection

Step 2.1, measuring the parallelism of the torsion arm hole axis (B-B1) relative to the reference axis (A-A 1), and setting a spacing L1 along the first direction and a spacing L2 perpendicular to the detection platform (1) between the joint assembly (6) and the torsion arm hole axis (B-B1);

step 2.2, measuring the parallelism of the axle axis (C-C1) relative to the reference axis (A-A 1), and setting a spacing L3 along the first direction and a spacing L4 perpendicular to the detection platform (1) between the axle assembly (8) and the axle axis (C-C1);